69 Road Runner Brake Master Cylinder Replacement
 

Hi Everyone out there in B Body Land!

Does anyone know where I might find a (how to) video on replacing the brake master cylinder on a 69 Road Runner with manual drum brakes? Thanks for all replies in advance!!!

Tom
Miami, Florida

I could give you a quick step by step easy install instructions.
There are pressurized bleeding machines but I'm assuming you're doing this old school.
1. On new master, fill with fluid on the bench or vise (vise preferred).
2. With 2 short brake lines bend them back into the reservoir and pump the piston on the back of the master with a screwdriver until the bubbles stop.
2a If no short brake lines available hold your thumb over the line outlets preventing air from entering while pumping. Safe to remove fingers when not pumping.
3. Unscrew the brake lines on the car and remove the 2 master cylinder nuts.
4. Pry or pull off the old master.
5. Place the new master on the car, tighten mounting nuts and car brake lines.
You're done!! No bleeding wheel cylinders if done this way.
BUT........If I were you, I would bleed the entire system with new fluid to remove moisture that naturally gets absorbed by brake fluid. You'll notice a huge braking improvement.

Thanks Kuvasz101! A couple of quick questions. So, are you saying that you don't have to disconnect the brake pedal from the push rod underneath the dash before removing the MC? Also, there is a small retainer with a screw that holds the piston in place on the back of the MC. Do you leave this in place when you install or do you remove it? I would think you leave it in place, correct? Thanks! for your help!

Tom
Miami, FL 33143

These are all good questions.
You leave the retainer on the new master cylinder, and you don't have to go under the dash at all.
The rod will just pop out of the old master cylinder with just a little prying.
Be careful not to spill the fluid on the paint it could damage it if left there.